Instructional Video
Khan Academy

Khan Academy: Question 1 A: 2015 Ap Physics 1 Free Response

9th - 10th
Free body diagram for two masses connected by string-pulley system. [5:18]
Instructional Video
Khan Academy

Khan Academy: Question 1 B: 2015 Ap Physics 1 Free Response

9th - 10th
Acceleration of two masses connected by string-pulley system. [9:35]